package cn.fan.study.first;

import cn.fan.demo.DemoClientHandler;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

/**
 * 时间服务器客户端
 *
 * @author HTHLKJ
 * @version 1.0
 * @date 2021/8/5 16:26
 */
public class TimeClient {
    public void connect(int port,String host){
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            Bootstrap b = new Bootstrap();
            b.group(workerGroup).channel(NioSocketChannel.class)
                    .option(ChannelOption.TCP_NODELAY, true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new TimeClientHandler());
                        }
                    });

            // Start the client.
            ChannelFuture f = b.connect(host, port).sync();

            // Wait until the connection is closed.
            f.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            workerGroup.shutdownGracefully();
        }

    }

    public static void main(String[] args) {
        int port=8080;
        if (args!=null&&args.length>0){
            try {
                port=Integer.valueOf(args[0]);
            }catch (NumberFormatException e){
                //采用默认值
            }
        }
        new TimeClient().connect(port,"127.0.0.1");
    }
}
